Interrupts/diagnostics alarms
5.2 Interrupts
Digital input module DI 8x24VDC ST (6ES7131-6BF01-0BA0)
22 Manual, 02/2019, A5E03574157-AF
5.2 Interrupts
The DI 8×24VDC ST digital input module supports diagnostic interrupts.
Diagnostics interrupt
The module generates a diagnostics interrupt for the following events:
● Short-circuit
● Wire break
● Parameter assignment error
● No supply voltage
5.3 Diagnostics alarms
A diagnostic alarm is generated and the DIAG-LED flashes on the module for each
diagnostics event. You can read out the diagnostics alarms, for example, in the diagnostics
buffer of the CPU. You can evaluate the error codes with the user program.
Table 5- 4 Diagnostics alarms, their meaning and how to deal with them
Short-circuit 1
H
Short-circuit to ground at transducer
Correct the process wiring
Wire break 6
H
Impedance of transducer circuit too
high.
Use a different transducer type or modify the wir-
ing, for example, use cables with larger cross-
Wire break between the module and
Connect the cable
Channel not connected (open)
• Disable diagnostics
• Connect a resistor of 25 kiloohms to
45 kiloohms to the transducer contacts
Parameter assign-
ment error
10
H
• The module cannot evaluate
parameters for the channel.
• Incorrect parameter assignment.
Correct the parameter assignment
No supply voltage 11
H
No or insufficient supply voltage L+
• Check supply voltage L+ on the BaseUnit
• Check BaseUnit type
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